I hear ya. When I'm at a high dose and try to do cardio...I hop on the bike and grab the HR sensors and it's usually close to my peak, before I even start peddling lol. This last cycle is the highest and longest I ever ran it, about 4 weeks and the last few were spent at around 150mcg (per needto so hush)...and id literally be standing there in-between sets and my ENTIRE body esp legs would shake like no other. Kinda embarrassing lol I'm sure plenty thought I was on crack (unless they were members of EF then they'd know I was a clenhead not a crackhead lol)